{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:28.653184", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2022-Oct-05_to_2022-Oct-07_175.0_-41.0"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2022100000262}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "October 05 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 07 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 61937.87216332492}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["New Zealand"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Pacific Ocean"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -41.0}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 175.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "175.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 174.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 176.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[174.35, -38.25], [174.25, -38.0], [174.47, -37.47], [175.0, -37.25], [175.5, -37.46], [176.0, -37.25], [176.53, -37.47], [176.75, -38.0], [176.65, -38.25], [176.68, -38.32], [177.03, -38.47], [177.25, -39.0], [177.04, -39.5], [177.25, -40.0], [177.15, -40.25], [177.25, -40.5], [177.03, -41.03], [176.68, -41.18], [176.53, -41.53], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.47, -41.53], [174.25, -41.0], [174.35, -40.75], [174.25, -40.5], [174.35, -40.25], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.47, -38.97], [173.82, -38.82], [173.97, -38.47], [174.32, -38.32], [174.35, -38.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.97, -38.47], [174.32, -38.32], [174.35, -38.25], [174.25, -38.0], [174.47, -37.47], [175.0, -37.25], [175.5, -37.46], [176.0, -37.25], [176.53, -37.47], [176.75, -38.0], [176.65, -38.25], [176.68, -38.32], [177.03, -38.47], [177.25, -39.0], [177.04, -39.5], [177.25, -40.0], [177.15, -40.25], [177.25, -40.5], [177.03, -41.03], [176.68, -41.18], [176.53, -41.53], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.47, -41.53], [174.25, -41.0], [174.35, -40.75], [174.25, -40.5], [174.35, -40.25], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.47, -38.97], [173.82, -38.82], [173.97, -38.47]]]]}, "2022-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.97, -38.47], [174.32, -38.32], [174.35, -38.25], [174.25, -38.0], [174.47, -37.47], [175.0, -37.25], [175.5, -37.46], [176.0, -37.25], [176.53, -37.47], [176.75, -38.0], [176.65, -38.25], [176.68, -38.32], [177.03, -38.47], [177.25, -39.0], [177.04, -39.5], [177.25, -40.0], [177.15, -40.25], [177.25, -40.5], [177.03, -41.03], [176.68, -41.18], [176.53, -41.53], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.47, -41.53], [174.25, -41.0], [174.35, -40.75], [174.25, -40.5], [174.35, -40.25], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.47, -38.97], [173.82, -38.82], [173.97, -38.47]]]]}, "2022-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.97, -38.47], [174.32, -38.32], [174.35, -38.25], [174.25, -38.0], [174.47, -37.47], [175.0, -37.25], [175.5, -37.46], [176.0, -37.25], [176.53, -37.47], [176.75, -38.0], [176.65, -38.25], [176.68, -38.32], [177.03, -38.47], [177.25, -39.0], [177.04, -39.5], [177.25, -40.0], [177.15, -40.25], [177.25, -40.5], [177.03, -41.03], [176.68, -41.18], [176.53, -41.53], [176.0, -41.75], [175.75, -41.65], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.47, -41.53], [174.25, -41.0], [174.35, -40.75], [174.25, -40.5], [174.35, -40.25], [174.32, -40.18], [174.25, -40.15], [174.0, -40.25], [173.47, -40.03], [173.25, -39.5], [173.47, -38.97], [173.82, -38.82], [173.97, -38.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.684182244095439}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.719363609420226}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.483262908581253, 4.671759180200809, 7.089730457432324]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.3335509158679315, 0.21544943755912982, 3.068334273351354]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.288868491854493, -6.118376862766306, -3.750845473639878]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.797207966241103, -7.684182244095439, -4.857264986161681]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.935713562895054, -2.760499342140548, -1.693833982594763]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9237068099012165, -3.4289239755408083, -1.9565306122577828]}}